VIPCALs
A ully au oma ed calib a ion pipeline
o VLBI da a
Diego Ál a ez O ega
Ins i u e o As ophysics – FORTH, C e e, G eece
10 h In e na ional VLBI Technology Wo kshop
23 d Oc obe , Go henbu g, Sweden
Mo i a ion
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Cu en pipelines
● PICARD
●VLBARUN
●EVN pipeline
VLBI Da a calib a ion
●Time consuming
●Expe ise-hea y
Bo leneck o p ojec s
in ol ing la ge samples
S ill equi e
human supe ision
No sui able o all da ase s
SMILE: Sea ch o Milli-Lenses
SMILE Sample
A chi al + New VLBA Da a
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●4968 adio loud AGNs
●Mainly C- and X-band
●~ 6000 iles, > 600 p ojec s
●> 60 TB o da a
●Obse ed o o e 30 yea s
Need o ull-au oma ion!
(o many g adua e s uden s)
Ca olina Casadio
VIPCALs
+Pa selTongue GUI buil wi h Pyside6
●Fully au oma ed calib a ion - no p io
knowledge on he da ase
●Quick, obus , ep oducible
●Runs on local o
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P e- elease e sion a ailable in Gi hub:
h ps://gi hub.com/dal a ezo/VIPCALs/
Docs
Calib a ion wo k low
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P e-loading
Loading and p e-calib a ion
Ampli ude & Phase calib a ion
●Sani y checks
●Spli mul iple equencies
●Calib a o selec ion
●Re ie e missing ables
●A e age i necessa y
●Remo e bad Tsys
●Choose e e ence an enna
●Typical AIPS VLBI wo k low
●Includes ionosphe ic co ec ions
●Final inge i on a ge
OR phase e e ence calib a o
Some au oma ion ea u es
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●P e-selec ion o ins umen al calib a o s
○Based on VLBA calib a o lis luxes
VLBA Calib a o Lis
Some au oma ion ea u es
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●P e-selec ion o ins umen al calib a o s
○Based on VLBA calib a o lis luxes
●Re ie al o calib a ion ables
○Fo VLBA and EVN expe imen s
Example o ANTAB ile
Some au oma ion ea u es
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●P e-selec ion o ins umen al calib a o s
○Based on VLBA calib a o lis luxes
●Re ie al o calib a ion ables
○Fo VLBA and EVN expe imen s
●Selec ion o e e ence an enna
○Based on co e age and SNR
Some au oma ion ea u es
23 d Oc obe , 2025 10 h IVTW, Go henbu g, Sweden 6
●P e-selec ion o ins umen al calib a o s
○Based on VLBA calib a o lis luxes
●Re ie al o calib a ion ables
○Fo VLBA and EVN expe imen s
●Selec ion o e e ence an enna
○Based on co e age and SNR
●Selec ion o ins umen al calib a o s
○Baseline-based selec ion based on SNR
Cu en Limi a ions
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●Non-s anda d o missing ables (20)
○Requi e manual edi ing
●Non-o de ed IF se ups (13)
●Suba ays (10)
○Only in some cases
●W ong o de in o ma ion in heade (2)
All o hem can be sol ed wi h small
adjus men s o he wo k low
Failed calib a ions (45/1417)
●To al in ensi y - No pola iza ion
●Con inuum
●cm-wa eleng h
●VLBA expe imen s
○Code needs ine- uning o o he
a ays
Tes ed on SMILE da a
Fu u e Wo k
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●Adjus and es on o he a ays (EVN, VGOS)
○Di e en me ada a, suba ays
Fu u e Wo k
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Bandpass a i ac
●Adjus and es on o he a ays (EVN, VGOS)
○Di e en me ada a, suba ays
●Au oma ic lagging o ob ious bad da a
○In equency
Fu u e Wo k
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VLA was
au o-phasing
●Adjus and es on o he a ays (EVN, VGOS)
○Di e en me ada a, suba ays
●Au oma ic lagging o ob ious bad da a
○In equency
○In ime
Fu u e Wo k
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●Adjus and es on o he a ays (EVN, VGOS)
○Di e en me ada a, suba ays
●Au oma ic lagging o ob ious bad da a
○In equency
○In ime
●Implemen opaci y co ec ions when
only wea he da a a e a ailable
○Opaci y measu emen s can be i ed using
Tsys and Ta m
○Impo an a highe equencies (> 22 GHz)
Fu u e Wo k
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Demo
A inash Kuma Felix Pö zl Alejand o Mus
Imaging
●Au oma ic, obus , and e icien
●Mul iple algo i hms (CLEAN, eh im, esol e)
●Simula ing ealis ic da a
Summa y
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●Cu en pipelines a e no scalable o la ge, he e ogeneous
samples
○SMILE equi es ully-au oma ed calib a ion
●VIPCALs deli e s end- o-end da a calib a ion wi h minimum
inpu
○Calib a ion is quick, obus , and ep oducible
●Success ully es ed on VLBA da a
○Cu en e sion sui able o SMILE:
ull in ensi y, con inuum, cm-wa eleng h
●Fu u e wo k
○Ex end o o he VLBI a ays
○Implemen new ea u es
h ps:// ipcals. ead hedocs.io/
h ps://gi hub.com/dal a ezo/VIPCALs/
Documen a ion:
Al a ez-O ega e al. (2025)
h ps://a xi .o g/abs/2508.13282
Science pape :
Ex a Slides
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F inge Fi Resul s
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●On a e age, FRING gi es 89% o
solu ions wi h SNR > 5
●Low inge a ios a e ela ed o low
luxes
○Fluxes ha a e no accu a e, as
hey come om VLA obse a ions
●Manual inspec ion o da a wi h low
inge a io poin s owa ds
non-de ec ions
F inge Fi Th eshold
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A. R. Thompson, J. M. Mo an, and G. W. Swenson J .,
In e e ome y and Syn hesis in Radio As onomy
